Definitely a “placeholder” kind of book. Not as engrossing as the first book, and I’m hoping the later ones will be a little more exciting. It seemed I read the whole thing waiting for the various plot lines to join together and the underlying theme to be revealed, and then got to the end of the book and it hadn’t happened. Furthermore the title is kind of a misnomer; not to spoil anything but it would be more accurately named if it had been called “The Long Almost-War,” because there wasn’t one. Beyond there not quite being a war, not a heck of a lot happens. We’ve established there are several million Earths, maybe an infinite number, with all kinds of unusual species living on them. Scientists study things? That’s useful. People travel in airships and slightly less arguing is done between disparate groups at the end of the book than at the beginning. Some people are jerks. Other people are not. Pretty standard. I am looking forward to watching the characters develop further throughout the series. Even one of the locations has started to unveil an ancient backstory which I’m hoping will continue to expand in the next two books. There are strong points, but overall this book didn’t have the same level of interest as the first one. It’s funny to think that a series set in a universe of unending worlds could get dull. Apparently even unrelenting novelty wears thin.